feat: add support for non-string data types

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---

Author: kgryte

lib/node_modules/@stdlib/ndarray/base/assert/is-real-data-type/README.md

@@ -42,7 +42,7 @@ var isRealDataType = require( '@stdlib/ndarray/base/assert/is-real-data-type' );
 
 #### isRealDataType( value )
 
-Tests if an input `value` is a supported ndarray real-valued data type.
+Tests if an input value is a supported ndarray real-valued data type.
 
 ```javascript
 var bool = isRealDataType( 'float32' );

lib/node_modules/@stdlib/ndarray/base/assert/is-real-data-type/lib/main.js

@@ -24,13 +24,16 @@ var contains = require( '@stdlib/array/base/assert/contains' ).factory;
 var dtypes = require( '@stdlib/ndarray/dtypes' );
 
 
+// VARIABLES //
+
+var isDataType = contains( dtypes( 'real' ) );
+
+
 // MAIN //
 
 /**
 * Tests whether an input value is a supported ndarray real-valued data type.
 *
-* @name isRealDataType
-* @type {Function}
 * @param {*} v - value to test
 * @returns {boolean} boolean indicating whether an input value is a supported ndarray real-valued data type
 *
@@ -74,7 +77,9 @@ var dtypes = require( '@stdlib/ndarray/dtypes' );
 * bool = isRealDataType( 'foo' );
 * // returns false
 */
-var isRealDataType = contains( dtypes( 'real' ) );
+function isRealDataType( v ) {
+	return isDataType( String( v ) );
+}
 
 
 // EXPORTS //

lib/node_modules/@stdlib/ndarray/base/assert/is-real-data-type/test/test.js

@@ -21,6 +21,7 @@
 // MODULES //
 
 var tape = require( 'tape' );
+var DataType = require( '@stdlib/ndarray/dtype-ctor' );
 var isRealDataType = require( './../lib' );
 
 
@@ -46,7 +47,17 @@ tape( 'the function returns `true` if provided a supported ndarray real-valued d
 		'uint8c',
 		'int16',
 		'int32',
-		'int8'
+		'int8',
+
+		new DataType( 'float32' ),
+		new DataType( 'float64' ),
+		new DataType( 'uint16' ),
+		new DataType( 'uint32' ),
+		new DataType( 'uint8' ),
+		new DataType( 'uint8c' ),
+		new DataType( 'int16' ),
+		new DataType( 'int32' ),
+		new DataType( 'int8' )
 	];
 	for ( i = 0; i < values.length; i++ ) {
 		bool = isRealDataType( values[ i ] );
@@ -67,6 +78,8 @@ tape( 'the function returns `false` if not provided a supported ndarray real-val
 		'complex128',
 		'complex64',
 
+		new DataType( 'binary' ),
+
 		// Unsupported dtypes:
 		'float',
 		'int',